[Freeswitch-users] RTCP FIR on floor change/new member join

Mon Mar 31 19:52:29 MSD 2014

Hi,

One of the browsers that I used for the initial testing was Chrome on
Android 4.3. I guess this was causing some of the problems.

I retested with the latest version from master (0876df6). When I make the
test with two desktop browsers indeed a new keyframe seems to be requested
on every floor change, as in this case the video stream switches almost
instantly.

However, the problem is still present for anyone who has just joined a
conference. Unless the floor changes shortly after someone joins, he has to
wait for the next keyframe. This is really simple to reproduce if there is
only one speaker in the conference and all the others who are joining the
conference are muted by default - in this case there is virtually no chance
of a floor change to occur.

Is a FIR packet also sent when someone joins a conference or is it
currently only sent on floor change events?

Best
Hristo

On Sat, Mar 29, 2014 at 3:11 PM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> Fir is sent explicitly no settings req
> On Mar 28, 2014 5:15 PM, "Seven Du" <dujinfang at gmail.com> wrote:
>
>> AFAIK FS has that so a jira would help
>> 2014年3月29日 上午4:57于 "Hristo Trendev" <dist.lists at gmail.com>写道：
>>
>>> Hi Brian,
>>>
>>> It's the latest v1.4.beta branch (555ef59) compiled on Debian 7.4. I can
>>> test with the master branch on Monday if needed. However, I am not really
>>> sure if the functionality to request a keyframe via RTCP FIR is even
>>> present in conference/freeswitch. In case it is indeed missing, then it
>>> will at least explain the behavior I see, otherwise I've probably missed
>>> something while testing.
>>>
>>> Best,
>>> Hristo
>>>
>>>
>>> On Fri, Mar 28, 2014 at 7:35 PM, Brian West <brian at freeswitch.org>wrote:
>>>
>>>> Please make sure you’re using the latest code, care to say what Rev
>>>> you’re on?
>>>> --
>>>> Brian West
>>>> brian at freeswitch.org
>>>> FreeSWITCH Solutions, LLC
>>>> PO BOX 2531
>>>> Brookfield, WI 53008-2531
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>>>>
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>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Mar 28, 2014, at 10:13 AM, Hristo Trendev <dist.lists at gmail.com>
>>>> wrote:
>>>>
>>>> > Hi,
>>>> >
>>>> > I've been testing a bit with WebRTC video using Chrome on Mac and a
>>>> Freeswitch conference. The problem that I have is that the WebRTC client
>>>> (Chrome) sends video keyframes every 3000 frames, which means that when a
>>>> new participant joins the conference it can be some time before he/she gets
>>>> a keyframe. The same problem occurs when the floor changes and the video
>>>> stream source of the conference is switched to another participant, whose
>>>> WebRTC client won't necessarily send a keyframe on floor change.
>>>> >
>>>> > As far as I understood after reading through a couple of Chrome
>>>> tickets, a keyframe can be requested by the receiving party - in this case
>>>> a Freeswitch conference, via RTCP FIR (Full Intra Request) or PIL (Picture
>>>> Loss Indication) packet.
>>>> >
>>>> > Ticket FS-5596 mentions FIR in its description, so it seems as if FS
>>>> already has support for FIR (or maybe I got it all wrong and the case
>>>> described in this ticket refers to RTCP packets, which are simply being
>>>>  proxied by FS). Additionally FS indicates in the SDP that it supports FIR.
>>>> >
>>>> > BTW, I am not even sure if I have configured the RTCP in Freeswitch
>>>> correctly. What I did was to uncommented "rtcp-video-interval-msec" and
>>>> "rtcp-audio-interval-msec" in the sofia SIP profile. However, I still see
>>>> in Chrome's log:
>>>> > webrtc: (rtp_rtcp_impl.cc:225): Process: Timeout: No RTCP RR received.
>>>> > webrtc: (rtp_rtcp_impl.cc:227): Process: Timeout: No increase in RTCP
>>>> RR extended highest sequence number.
>>>> >
>>>> > The real question is if the conference app can be configured/patched
>>>> to send an RTCP FIR packet to the member who has the floor whenever a new
>>>> participant joins the conference or in case the floor itself just moved to
>>>> someone else.
>>>> >
>>>> > Has anyone tested something similar?
>>>> >
>>>> > BR
>>>> > Hristo
>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>> 
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>>>
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>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
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>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
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>> http://www.cluecon.com
>>
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>>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> 
> 
>
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>
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